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1.发明公开Method and apparatus for frustrating vertical interval detection in scrambled television signals 失效用于防止在加密电视信号的垂直间隔的检测方法和装置。
公开(公告)号：EP0518128A2
公开(公告)日：1992-12-16
申请号：EP92108924.9
申请日：1992-05-27
IPC分类号： H04N7/167
CPC分类号： H04N7/1713
摘要： In order to defeat pirate descramblers that detect the occurrence of a vertical blanking interval from a gap in timing data provided on the sound carrier of a scrambled television signal, diversionary pulse information is inserted into the sound carrier during the vertical blanking interval. A pirate descrambler that looks for a gap in data transmitted on the sound carrier will then detect a "false" second gap, and incorrectly phase lock its horizontal oscillator to random video instead of to horizontal timing information that is recoverable during the vertical blanking interval.
摘要翻译： 为了战胜海盗解扰并从在定时提供一个扰频的电视信号的伴音载波上的数据的间隙检测的垂直消隐间隔的发生，牵制脉冲信息在垂直消隐间隔期间插入到声音载波。 海盗解扰器，看起来对于在数据反式的间隙mitted伴音载波上，然后将检测到一个“假”第二间隙，并错误地相位锁定它的水平振荡器随机视频而不是到水平定时信息所做的垂直消隐间隔期间是可恢复的。
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2.发明公开Method and apparatus for frustrating vertical interval detection in scrambled television signals 失效用于在屏幕电视信号中进行垂直间隔检测的方法和装置
公开(公告)号：EP0518128A3
公开(公告)日：1993-03-17
申请号：EP92108924.9
申请日：1992-05-27
IPC分类号： H04N7/167
CPC分类号： H04N7/1713
摘要： In order to defeat pirate descramblers that detect the occurrence of a vertical blanking interval from a gap in timing data provided on the sound carrier of a scrambled television signal, diversionary pulse information is inserted into the sound carrier during the vertical blanking interval. A pirate descrambler that looks for a gap in data transmitted on the sound carrier will then detect a "false" second gap, and incorrectly phase lock its horizontal oscillator to random video instead of to horizontal timing information that is recoverable during the vertical blanking interval.
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